JPH0723944Y2 - Coil parts - Google Patents

Description

TECHNICAL FIELD The present invention relates to a coil component widely used in electric circuits such as signal control circuits, demodulation circuits, oscillation circuits, and amplification circuits.

2. Description of the Related Art Conventionally, as this type of coil component, there is a coil component 10 as shown in FIG. This coil component (10) has a coil (15) formed by winding a bobbin (14) having a plurality of winding grooves (12) coaxially arranged in parallel with each other and a plurality of flanges (13) forming the winding groove (12). An electric signal is taken out by electrically connecting the end portion of the winding to the bobbin terminal 16 part of which is planted in the collar 13, and each winding groove 12 has an arbitrary number of windings and windings. By winding with the direction and winding specifications, it is possible to obtain arbitrary electrical characteristics as a coil component. Further, by selecting the material forming the bobbin 14, it is possible to obtain a desired electrical characteristic as well.

When the bobbin 14 having the conventional structure is wound, the coil of each winding groove 12
Natural magnetic coupling occurs between 15 even if it is not adjusted depending on the winding specifications. When this coil component is used in the LC filter circuit 17 as shown in Fig. 8, when the natural magnetic coupling is larger than necessary. , Part of the input signal appears at the output as crosstalk distortion. Alternatively, as shown in FIG.
There is a problem that the preshoot distortion 19 becomes large in the square wave output signal waveform 18 when the square wave signal is input to the LC filter circuit 17.

Conventionally, in order to solve the above-mentioned problems, natural magnetic coupling was reduced by winding specifications, but the winding specifications become complicated and the defect rate increases, or other electrical characteristics are adversely affected. There were challenges.

Further, in order to reduce the conventional bobbin shape, in order to reduce the winding pitch 15a in FIG. 7, when the width dimension 13a of each collar 13 is narrowed, the natural magnetic coupling between the coils is also the same. Grows larger.

Further, in order to obtain a larger inductance value, even when a material having a larger relative permeability is used as the material forming the bobbin 14, the natural magnetic coupling between the coils is increased, and thus the same problem as the above problem occurs. It was happening.

The present invention solves the above-mentioned conventional problems and aims to improve or reduce the size of the electrical characteristics, or to increase the maximum inductance value obtained in the winding and to reduce the natural magnetic coupling between the coils or to obtain an appropriate value. An object of the present invention is to provide a coil component that can obtain magnetic coupling arbitrarily.

Means for Solving the Problems Means of the present invention for solving the above problems include two or more winding grooves and a plurality of flanges forming the winding grooves, and the winding groove without the winding or the winding groove. The flange is provided with one or more through holes or holes in a direction orthogonal to the winding axis of the bobbin.

Action This structure creates a gap between the through holes or the coils on both sides of the hole. By changing the relative permeability in this gap with respect to the relative permeability of the material forming the bobbin, the through holes or The magnetic flux density passing between the coils on both sides of the hole can be changed to reduce the natural magnetic coupling between the coils or adjust it to an appropriate value.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a coil component of the present invention. The coil component 1 includes a plurality of winding grooves 2 and a plurality of collars 3 forming the winding grooves 2.
And a coil 5 formed by winding the winding groove 2 of the coil bobbin 4, and a bobbin terminal 6 planted in a collar 3 for electrically connecting the ends of each coil 5. ing. The bobbin 4 is made of a material in which a powder of ferrite, which is a kind of magnetic material, is mixed in an insulating resin, and increases the inductance value of each coil 5.

Each of the collars 3 of the bobbin 4 is provided with a through hole 7 in a direction perpendicular to the winding axis, and air exists inside the through hole 7, but the relative magnetic permeability forms the bobbin 4. Since the relative magnetic permeability of the resin containing ferrite powder is smaller than that of the ferrite powder-containing resin, the magnetic flux passing between the insides of the coils 5 on both sides of the through hole 7 is reduced, so that the natural magnetic coupling between the coils 5 can be reduced. This is possible, and as an example of the result, when the LC filter circuit 17 shown in FIG. 8 is formed by this coil component 1 and a square wave signal is input, the output signal is
The preshoot distortion 19 as shown in the figure can be reduced.

Further, by providing the through hole 7, when the natural magnetic coupling is excessively reduced, the magnetic coupling can be artificially adjusted to some extent by the winding, but it is difficult to finely adjust the magnetic coupling because the winding specifications are complicated. There is a problem such as. In such a case, as shown in FIG. 2, a magnetic body 8 having an arbitrary relative magnetic permeability is inserted into the through hole 7 and the insertion degree is adjusted so that an arbitrary magnetic field can be obtained within a certain range after winding. A bond is obtained,
Moreover, the coil component 9 that can obtain an arbitrary inductance value within a certain range can be configured.

Also in the coil component 10 according to the conventional technique, magnetic coupling and the inductance value can be adjusted by providing through holes or holes in the collar 13 or the winding groove 12 of the bobbin after the winding. In this case, after measuring the inductance value, by providing through holes and holes according to the value, it is possible to suppress variations in the inductance value due to variations in the windings, etc., and improve the yield of coil parts and reduce costs. There is also an advantage that you can.

In addition, in the said Example, although the example which provided one through-hole 7 in each collar 3 was shown, as shown in FIGS. 3-6, the shape of hole 7a, 7b, depth, several through-holes. 7c may be provided and the position thereof may be arbitrarily selected, and two or more kinds of through holes or holes may be present in the same bobbin or the same collar.

That is, what is shown in FIG. 3 is a structure in which a circular hole 7a and a truncated cone-shaped hole 7b that do not penetrate from the upper and lower surfaces of the collar 3 of the bobbin 4 are provided, and the one shown in FIG. It has a structure in which two same through holes 7c are provided in the collar 3,
The one shown in FIG. 5 also has a through hole 7d formed in the collar 3 in the direction of arranging the bobbin terminal 6 which is orthogonal to the winding axis. The one shown in FIG. The through hole 7e is formed in the winding shaft portion between the collars 3, and the through hole or the hole may be provided between the coils 5.

Further, in the present embodiment, the example in which the through holes or holes are provided in all of the collars 3 is shown, but the number of flanges or winding grooves in which the through holes or holes are provided is
It is optional regardless of the number of collars or winding grooves on the entire bobbin.

The shape, number, insertion method, material, and insertion position of the magnetic body to be inserted into the through hole or hole are arbitrary as well as the through hole or hole, and the magnetic body is not necessarily inserted into all the installed through holes or holes. No need.

Further, in the present embodiment, an example of the coil component made of the bobbin formed of the ferrite powder-containing insulating resin is shown, but the material of the bobbin is arbitrary and is not limited to this.

Further, the bobbin shape is not limited.

In addition, LC composite parts, LR
It goes without saying that it can be applied and designed as a part of a coil composite component that is combined with another electric element such as a composite component.

Effects of the Invention As described above, the effects obtained by the present invention can reduce the natural magnetic coupling or can be adjusted to an appropriate value, so that the characteristics of the coil component can be improved as compared with the conventional one and the variation can be improved. Since it can be suppressed, it becomes possible to tighten the standard of the characteristic of the coil component, and it is possible to be superior in the characteristic aspect to the conventional coil component. Further, since the defect occurrence rate is reduced, the yield is improved and the cost can be reduced. Further, since the magnetic coupling can be changed regardless of the number of windings of the winding, the inductance value as a coil component can be changed, and a new type variable inductance component can be provided.

Also, when the shape of the coil component is made smaller or the bobbin is formed of a material having a higher relative magnetic permeability than before, the present invention can be used to suppress an increase in natural magnetic coupling, thus reducing the size of the coil component. Can be realized. In addition, the characteristics can be improved by increasing the inductance value and reducing or adjusting the magnetic coupling, and in the case of multiple coils, the magnetic coupling of the adjacent coils can be adjusted independently and arbitrarily, and the through hole or When the hole is provided, it is possible to adjust the magnetic coupling while suppressing the change in the inductance of the coil as much as possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the coil component of the present invention,
FIG. 2 is a perspective view showing another embodiment of the coil component of the present invention, FIGS. 3 to 6 are partial detailed views of the coil component according to another embodiment, and FIG. 7 is a perspective view of the conventional coil component. FIG. 8 is a circuit diagram of the LC filter, and FIG. 9 is a characteristic diagram showing a square wave output signal waveform. 1 ... Coil part, 2 ... Winding groove, 3 ... Tsuba, 4 ... Bobbin, 5 ... Coil, 6 ... Bobbin terminal, 7,7c, 7d, 7e ......
Through holes, 7a, 7b ... Hole, 8 ... Magnetic material, 9 ... Coil parts.

Claims (2)

[Scope of utility model registration request] 1. A winding groove having two or more winding grooves and a plurality of flanges forming the winding groove, and one or more penetrating holes in the winding groove without winding or in the direction orthogonal to the winding axis. A coil component made by winding a bobbin with holes or holes. 2. The coil component according to claim 1, wherein a magnetic material is inserted into the through hole or the hole.